A design system is only as durable as the organization built to sustain it. I've built four from the ground up, at a Fortune 500 company, an airline, a fast-scaling startup, and a company mid-IPO, and in every case, the hardest part was never the components. It was recruiting the right team, earning executive confidence before the system was mature enough to prove its value, and hiring for range rather than sameness so the team could scale into ambiguity. One of these systems had to be rebuilt entirely after significant team turnover. Another had to hold together through three reorganizations in under three years. Systems that only work in stable conditions aren't really infrastructure. Onboarding, career growth, and team composition are what make systems work last past the disruption that tests them, and past the person who built them.